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You use a rope to slowly pull a sled and its passenger 50 m up a...

You use a rope to slowly pull a sled and its passenger 50 m up a 20∘ incline, exerting a 125-N force on the rope. A-How much work will you do if you pull parallel to the hill? B-How much work will you do if you exert the same magnitude force while slowly lowering the sled back down the hill and pulling parallel to the hill?

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